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Thu Jun 20 13:21:11 2019

Information about: apod.com
Popularity/access rank: Site number 232755 (.com extension); 377132 (global rank)
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Apod information:

TitleAstronomy Picture of the Day
Description A different astronomy and space science related image is featured each day, along with a brief explanation.
Keywordsspacecraft, asteroid, collision, gravity, tractor near earth asteroid
Address http://apod.nasa.gov/apod/ Add this site to your favorite list


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Apod Summary

Astronomy Picture of the Day. Astronomy Picture of the Day. Discover the cosmos! Each day a different image or photograph of our fascinating universe is.
featured, along with a brief explanation written by a professional astronomer. 2013 February 21.
Gravitational Tractor. Illustration Credit & Copyright: Dan Durda ( FIAAA , B612 Foundation )
Explanation: How would you change the course of an. Earth-threatening.asteroid? One possibility - a massive spacecraft that uses gravity as a towline -
is illustrated in this artist's vision of a gravitational.tractor in action. In the hypothetical.
scenario worked out.in 2005 by Edward Lu and Stanley Love at NASA's. Johnson.Space Center , a 20 ton.
nuclear-electric.spacecraft tows a 200 meter diameter asteroid by simply hovering.near the asteroid.
The spacecraft's. ion drive.thrusters are canted away from the surface. Their slight but steady thrust would gradually and.
predictably alter the course of the tug and asteroid, coupled by their.mutual ...



Popularity Rank of apod.com
Alexa Rank Alexa Rank Date
377132 2013-05-15
259632 2013-05-01
219999 2013-04-15
269145 2013-04-01
212920 2013-03-15
256048 2013-03-01
310458 2013-02-15
234183 2013-01-30
239380 2013-01-08
378683 2012-11-17
460347 2011-12-06
239682 2011-08-13

Access traffic rank of apod.com (site position)

Server IP of apod.com: 141.219.155.203 (hosted by Michigan Technological University)
Domain extension: .com (list top sites in .com (Commercial))

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2 images found on apod.com:


Links found on Apod homepage:

External links:

apod.com is linking to those sites:

  1. Discover the cosmos!
  2. FIAAA
  3. B612 Foundation
  4. Earth-threatening
  5. scenario worked out
  6. Johnson Space Center
  7. nuclear-electric
  8. ion drive
  9. steady thrust
  10. ion drives do power
  11. structure
  12. Given sufficient warning and time
  13. gravitational tractor could deflect
  14. Howard Astronomical League, Columbia, MD
  15. <
  16. Index
  17. Search
  18. Calendar
  19. RSS
  20. Education
  21. About APOD
  22. Discuss
  23. >
  24. Robert Nemiroff
  25. MTU
  26. Jerry Bonnell
  27. UMCP
  28. NASA Web Privacy Policy and Important Notices
  29. ASD
  30. NASA
  31. GSFC
  32. Michigan Tech. U.



site visit date: 2013-02-21 04:47:30
apod.com site information


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